Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ce30d0e7118be9…

MALICIOUS

PDF

70.4 KB Created: 2021-09-06 13:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ed4286da1ab366d6535ccebe185639e9 SHA-1: 152eb926e7da160e1e34c241dd828d594c53b648 SHA-256: d9ce30d0e7118be95a712fa48597e85711e317f13b0c218b3535417ed9fe3314
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or use link farms, suggesting an attempt to distribute malware or conduct phishing. Although no scripts were explicitly extracted, the PDF structure and embedded links indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/l9goj3j02sjomsm68s45tb7ito/80002047893.pdf In PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/1087d3630af7c574500d3a449ead7803/31642772681.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210812165513_6whebk.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/31668156824.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/34e53eefaa7c70c453209a381faab55c/rigonapefugewumiviluf.pdfIn PDF document text
    • https://nidi.mk/ckfinder/userfiles/files/lipijomibupagopu.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093f680d4737---zapatujulogajobavawud.pdfIn PDF document text
    • https://daqing-jewelry.com/uploads/files/202109052210042530.pdfIn PDF document text
    • https://campermagazine.tv/public/file/77555230517.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/45103961775.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/pojizuvelabozejopuvaf.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/15529059891.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dda1067876a---juvuxi.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4370ca7fa---2461360370.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/cpo52e9sqmmr3e2hqbb9del0dc/77385225220.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c433ed51d58---gugumunubebin.pdfIn PDF document text
    • http://slippersymposium.com/clients/875641/File/gitixetupasanulakedusizaf.pdfIn PDF document text
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/jejitomakuxaboxufewonak.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/12810610114.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/lojexodega.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/xosozasuk.pdfIn PDF document text
    • https://langestrand.se/anvandarbilder/204/files/maxivobosabivineba.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337b5f427be---seruwekemumu.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b43330718f9---gumuta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=following+directions+worksheet+for+middle+schoolPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB578 14832 bytes
SHA-256: 794db10d5d206edddb08dd957825e27456d61ef9d29d864202a8eca1c2c7e4f9
font_01_sfnt_off0000daa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA9 10916 bytes
SHA-256: f0628bd78da2e86af81361e274ccac55178f344ab605a4c11a09fc99e4963e13
font_02_sfnt_off0000f38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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